Topic: Regression Questions and Study Design

Population Quantities and Sample Estimates

Observational Data and Association Questions

Observational Units and Units of Analysis

Matching Study Design to the Research Question

Measurement Choices and Construct Validity

Explanatory Questions and Association Targets

Ecological and Individual-Level Conclusions

Descriptive Regression Questions and Conditional Means

Defining Outcomes for Regression Questions

Cross-Sectional Timing and Interpretation